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Chondrule sizes
- To: meteorite-list@meteoritecentral.com
- Subject: Chondrule sizes
- From: Bernd Pauli HD <bernd.pauli@lehrer1.rz.uni-karlsruhe.de>
- Date: Sun, 13 Jun 1999 22:04:12 +0200
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- Resent-Date: Sun, 13 Jun 1999 16:22:09 -0400 (EDT)
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Brian wrote:
> What size are the biggest known chondrules?
Hello Brian, Alex, Jim, and List,
D.D. EISENHOUR (1996) Determining chondrule size distributions
from thin-section measurements (Meteoritics 31-2, 1996, 243-248).
J.C. BRIDGES et al. (1997) A survey of clasts and large chondrules in
ordinary chondrites (Meteoritics 32-3, 1997, 389).
In their paper Bridges and Hutchison report the results of a survey of
clasts and large [> 5mm (!)] chondrules - so-called macrochondrules
within the ordinary chondrites of the NHM collection. Here are some
record holders from their listed chondrites:
Parnallee - LL3 - 3 mm
Bremervörde - H3 - 4 mm
Estecado - H6 - 7 mm and 10mm
Barratta - L4 - 8 mm
Belle Plaine - L6 - 9 mm
> Perhaps a really large chondrule may be close to a centimeter in size.
Yes, Jim, you are absolutely right. The largest chondrules listed are:
Bluff - L5 - 10 mm
Crumlin - L5 - 11 mm
M.K. Weisberg and M. Prinz (1991) El Djouf 001: A new CR2 chondrite
(Meteoritics 26-4, 1991, 406-407):
"Chondrules range from 0.09 to 6 mm in maximum dimension. The larger
chondrules are multilayered ..."
"Similar large (3-4 mm) multilayered chondrules occur in the other CR2
chondrites, but ED001 is endowed with some exceptionally large ones (> 4
mm)."
Best regards,
Bernd
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